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. 2020 Nov 3;68(1):28–34. doi: 10.1016/j.jadohealth.2020.09.038

Figure 1.

Figure 1

Ranges of acceptable tests per true positive (TTP) identified from cost-effectiveness for five RT-PCR based strategies. Columns represent values of TTP for which the different screening strategies are preferred for probabilities of COVID-19 of .4473%, 1%, 5%, and 10%. Red narrower cross hatch represents the TTP for which (Strategy 2) symptom-based testing or (Strategy 1) symptom-based screening is preferred; green narrower diagonal represents the TTP for which (Strategy 1) symptom-based screening or (Strategy 4) retesting students with negative tests and symptoms is preferred; blue wider cross hatch represents (Strategy 4) retesting students with negative tests and symptoms is preferred; and magenta wider diagonal represents (Strategy 5) retesting all students with negative tests is preferred. Strategy 3 is never preferred because of weak dominance. RT-PCR, reverse transcription polymerase chain reaction.